cylinder focusing mirror 柱面聚焦反射镜组
One dimensional Fresnel zone phase correcting plate has its focusing characteristics similar to that of the paraboloid cylinder.
一维菲涅尔区相位修正结构具有类似于抛物柱面的聚焦特点。
Investigators are focusing on the idea that an oxygen cylinder might have exploded mid-flight, ripping a hole in the side of the plane.
调查者认为可能是一个氧气瓶在飞行途中发生爆炸，在机身上撕裂了一个大口子。
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